Patent · US Expired

Objective for endoscopes and process for its production

US4815833A · kind A · utility

29Cited by

1References

10Claims

0Family size

Assignee

RICHARD WOLF GMBH · DE

Inventors

Jurgen Zobel · Bretten, DE
Siegfried Karst · Eisingen, DE
Rolf Zickwolf · Bretten, DE
Wilfried Uhrich · Oberderdingen, DE

Key dates

Filing date	Nov 20, 1987
Grant date	Mar 28, 1989
Priority date	—
Expiry date	Nov 20, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG02B23/243
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An objective for endoscopes with a lateral objective lens comprises an elongated prism having a convex proximal end surface and a distal end on which are joined by cementing after alignment on an optical axis, a diaphragm, a negative lens and optionally a wedge-shaped support, to form an indissoluble unit. The lens, the diaphragm and the support if present are provided with sections protruding radially beyond a desired periphery of the objective, which sections are ground off together to the dimension of the prism circumference, so that a rod-shaped objective unit is formed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.